Directions: On this worksheet you will practice with the basic definitions of introductory motion.

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Question 1 A bike messenger traveled 2 blocks North, 5 blocks East, 7 blocks South, and finally 8 blocks West in order to deliver a package in the traffic, congested city. If his trip took 39 minutes, what was the magnitude of his average velocity in blocks/minute?

2.2 x 1011.5 x 10-15.64 x 10-15.83 x 1002.05 x 10-1

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Question 2 If the messenger in Question #1 could have traveled directly to his destination, what would have been the direction of his net displacement?

139.4 deg220.6 deg121.0 deg239.0 deg149.0 deg

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Question 3 The magnitude of an object's average velocity can ONLY equal the magnitude of its average speed when the object is

traveling in astraight linestanding stilltraveling in successivedirections that change by 90ºtraveling in a circle

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Question 4 A scalar is a quantity that can be completely described by stating its

sizedirectionsize and direction

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Question 5 A family taking a vacation traveled 5 hours at 65 mph and then 2 hours at only 48 mph. What was their average speed during this trip?

56.5 mph60.1 mph48.9 mph52.9 mph

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Question 6 Which quantity is NOT a scalar?

timeaccelerationdistancemass

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Question 7 Which description of an object's motion is more specific: moving at a constant speed or moving at a constant velocity?

constant speed since it demands that the objecthas to maintain a constant rateregardless of its direction of motionthe two terms are completely equivalentconstant velocity since it demands that the objectnot only move at a constant rate,but also maintain a constant direction

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Question 8 A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 78 meters at 1.5 m/sec, then runs 234 meters at 2.2 m/sec, and finally cools down by finishing the final 88 meters at 1.0 m/sec. What was his average speed?

2.35 m/sec1.57 m/sec1.62 m/sec1.80 m/sec

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Question 9 What was the student's average velocity in Question #8?

0 m/secthe same as his average speedcannot be determined

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Question 10 During a 30 minute period of time, one car moves at a constant velocity of 45 mph, N, while a second car moves at a constant velocity of 45 mph, W. During this time interval, the cars would have the same

A. instantaneous speed

B. instantaneous velocity

C. displacement

D. acceleration

B and CA and CC and DB and DA and D

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Question 11 A moving van completes its journey of 585 kilometers in 8 hours. Approximately how far should it have traveled 5.5 hours after beginning its trip?